Blackhawks 5, Blues 1

Duncan Keith had a goal and three assists, and the host Chicago Blackhawks used a four-goal third period to finish off the St. Louis Blues in Game 6 of their first-round playoff series on Sunday.

Chicago won four in a row after a slow start in St. Louis.

Jonathan Toews, Patrick Sharp, Andrew Shaw and Keith scored in the third period as the Blackhawks improved to 14-2 in home playoff games over the last two seasons. Corey Crawford made 35 saves, keeping Chicago in a tie game when St. Louis controlled the second period.

T.J. Oshie scored for the Blues, who outshot the Blackhawks 36-27. Ryan Miller finished with 22 saves.

St. Louis went 0-for-6 in 10 minutes of power-play time over the first two periods, wasting a chance to take the lead. The Blues went 2-for-29 with the man advantage for the series.

The Blackhawks also struggled on the power play, but they scored when it mattered most.

With Jay Bouwmeester in the box for tripping, Keith made a nice stop to keep the puck in the St. Louis zone, then fired a pass over to Toews. The captain beat Miller over his right shoulder for a 2-1 lead just 44 seconds into the third period.

It was Toews’ third goal of the series. Toews’ 23rd career postseason goal seemed to take the air out of the Blues.

Rangers 4, Flyers 2

Brad Richards and Dominic Moore scored second-period goals, and Henrik Lundqvist made 24 saves in Game 5 as the New York Rangers pushed the Philadelphia Flyers to the brink of elimination.

Defenseman Marc Staal gave the Rangers the lead in the first period and they extended it in the second in taking a 3-2 edge in the first-round series. Game 6 is Tuesday in Philadelphia. If necessary, a deciding seventh game would be back Wednesday at Madison Square Garden.

The teams have alternated wins the entire series. New York clinched this one on Brian Boyle’s empty-net goal with 15 seconds remaining.

Philadelphia’s Steve Mason wasn’t nearly as sharp in his second consecutive start following a late-season injury. He stopped 18 shots after his 37-save effort in Game 4.

Vinny Lecavalier made it 3-1 late in the second period on the power play, and Claude Giroux scored his first of the series with 1:29 left after Mason was pulled for an extra skater.

But Moore won a race to negate an icing call and fed a pass to Brian Boyle, who scored with 15 seconds left to seal it.

Ducks 5, Stars 4

Nick Bonino scored 2:47 into overtime, after getting one of Anaheim’s two goals late in regulation, and the Ducks beat the host Dallas Stars in Game 6 to clinch the first-round series.

The Ducks scored twice in the final 2:10 of regulation to force overtime.

Bonino skated around from behind the net and got a puck over Kari Lehtonen’s left shoulder to get the Ducks within 4-3. Anaheim got the overtime-forcing goal with 24 seconds left after a wild scramble in front of the net. When the puck trickled free, Devante Smith-Pelly pushed into the open gap for his second goal of the game.